Trigonometric Functions Of Sum And Difference Of Two Angles
Chapter Name : Trigonometric Functions |
Sub Topic Code : 104_11_03_04_01 |
Topic Name : Trigonometric Functions Of Sum And Difference Of Two Angles |
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Sub Topic Name : Trigonometric Functions Of Sum And Difference Of Two Angles |
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Introduction
So, how to deal with the sum of angle. In these slides we will learn how to find the sine, cosine and tangent of the sum and difference of the angles.
Pre-Requisites:
Angles, definition of trigonometric functions, their domain and range
Real Life Question:
Can we measure heights by simply calculating the angle and distance on ground?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Sine | In a right triangle, it is the ratio of the perpendicular to the hypotenuse. |
| Cosine | In a right triangle, it is the ratio of the base to the hypotenuse |
| Tangent | In a right triangle, it is the ratio of perpendicular to the base. |
Learning aids / Gadgets
| Gadgets | How it can be used |
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Real life uses :
It is used wherever we have to find the height or elevation of a mountain or a cliff that comprises of several angles. These formulae are also used widely in Newtonian mechanics, vector algebra and geometry.
Practical examples around us
| Examples | Explainations |
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What you learn in Theory:
How to find the sine, cosine and tangent of sum of the angles?